MC9S12XF512_1 Datasheet, PDF (1209/1306 Pages) Freescale Semiconductor, Inc – S12X Microcontrollers

Appendix A Electrical Characteristics
The number of program/erase cycles for the EEPROM/D-Flash resources depends upon the partitioning
of D-Flash used for EEPROM Emulation. Defining RAM size allocated for EEE as RAM-EE and D-Flash
partition used for emulation as FLASH-EE, the minimum number of program/erase cycles is specified
depending upon the ratio of FLASH-EE/RAM-EE. The minimum ratio FLASH-EE/RAM-EE=8.
Figure A-2. Program/Erase Dependency on D-Flash Partitioning
# K Cycles
(Log)
1,000,000
100,000
10,000
1,000
100
10
10
100
1000 10,000 100,000
Spec Cycles
5 Year Data Retention
20% Spec Cycles
10 Year Data Retention
EEE_NVM/EEE_RAM ratio
(Log)
Freescale Semiconductor
MC9S12XF - Family Reference Manual, Rev.1.19
1209